Power-driven rotary scaling machine



Dec. 23, 1952 a. B. CRISP 2,622,312 7 POWER-DRIVEN ROTARY SCALING MACHINE Filed April 50, 1948 IN V EN TOR.

Patented Dec. 23, 1952 POWER-DRIVEN ROTARY SCALING MACHINE George B. Crisp, Brooklyn, N. Y. Application April 30, 1948, Serial No. 24,131

1 Claim.

This invention relates to scaling tools, and more particularly to scaling tools of the power operated type as are used for the removal of rust and paint or the like from iron or other surfaces.

It is an object of the invention to provide a scaling tool having generally improved characteristics over scaling tools heretofore used and known to the art.

It is a further object of the invention to provide a scaling tool which is safe and reliable in operation, and is economical to manufacture.

Further objects and advantages of the invention will be afforded by the following detailed description considered in connection with the accompanying drawing, and those features of the invention which are believed to be novel and patentable will be pointed out in the claim appended hereto.

The invention will be described with reference to the accompanying drawing wherein- Figure 1 is a cross sectional view of a scaling tool embodying the invention.

Figure 2 is an end view of the scaling tool showing the scaling bit assemblies.

Referring to the drawing in detail, a bearing assembly II], comprising a base II and bearing housing I 6, is secured to a base plate 4| by means of bolts and nuts I2. The bearing housing II is provided with self-aligning ball bearing assemblies I3 and I4 positioned by means of a tongue I5 of the top bearing housing portion I6, and retaining plates I1 and I8.

Bearing assemblies I3 and I4 are similarly formed, comprising an outer race and inner race, and having a plurality of ball bearings riding in suitable grooves of said inner and outer races. The outer ring is securely positioned in the bearing housing assembly and the inner ring or race 22 is permitted a rotational movement respective the longitudinal axis of a shaft passing through the bearing so that warping of the shaft does not cause excessive wear of the bearing. The movev ment of the inner race respective the outer race I9- engages an internal thread coupling member 26 of cutter assembly disc 25, and is locked in place by means of locknut 21. Shaft vibration and thrust load are resisted by passing spindle I9 through self-aligning bearing assemblies I3 and I4, and having a collar 2I, which is secured to spindle shaft I9, in abutment with an inner bearing race 22 of the bearing assembly I4.

The cutter assembly is formed with a disc 25, to which 'is secured a plurality of cutter tools in balanced arrangement. Each cutter tool com-- prises a body member 32 adapted to receive, and

project from one end thereof a cutter or tool bit; 36 with shoulder 31; washers 38 for centering said. tool bit; and spacer discs 39. Each cutter tool 20, is secured to disc 25 by means of brackets or arms 28 which are fastened to the disc by means of bolts 29 and nuts 30. The cutter tools 20 are resiliently secured to brackets or arms 28 by means of springs 33 which are in engagement with a flange 34 of body member 32 at one extremity, and with a surface area of arms 28, and by means of a nut 35 and cap nut in engagement with an opposite surface of arm 28.

Although arm 28 has heretofore been referred to as being secured to disc 25, I desire it understood that the arms have some freedom of movement, and this freedom of movement in conjunction with the ability of spring 33 to recoil, permits the arm and spring to absorb sudden stresses to which tool bit 36 is subjected when it strikes another surface.

Ease of operation of the scaling tool is accomplished by mounting the base plate 4| on wheels 42 and pins 43 and 44, and providing a handle 45 for propelling the tool in the process of operation. Thus it is no longer necessary for an operator to carry a heavy scaling tool, as with my improved scaling tool, the operator is merely required to move the tool by means of the handle 45.

Having thus disclosed and described my invention, I desire to point out that modifications of the particular arrangement which I have disclosed as embodying my invention will occur to those skilled in the art, so that I do not desire my invention to be limited to the particular arrangement set forth, and I intend in the appended claim to cover all modifications thereof which do not depart from the spirit and scope of my invention.

What is claimed is:

In a power driven rotary scaling machine comprising a base member, a motor secured to said base member and a cutter assembly adapted to be rotated by said motor, said cutter assembly ineluding a disc, a plurality of brackets arrayed in balanced position around the circumference of said disc, a plurality of cutter tools each com prising a hollow body member having a threaded portion at one extremity and an aperture for receiving a tool bit at the other extremity thereof, a flange adjacent the extremity adapted to receive said tool bit, and means resiliently securing said cutter toolsto each of said brackets, said means including a spring between said flange and one side of said bracket and a threaded cap in engage-- ment with the threaded portionot said body: 2

REFERENCES CITED The following references are of recordin thev file of this patent:

UNITED STATES PATENTS Number Number Name Date Grant Mar. 26, 1907 Yeldirig Mar. 9, 1926 Johnston Jan. 28, 1930 Aurand Aug. 30, 1932 Scheffler July 28, 1936 Blood Feb. 18, 1941 Bousky ,Dec; 4, 1945 Westphal Oct. 10, 1950 FOREIGN PATENTS Country Date Great Britain Mar. 14, 1921 Great Britain Apr. 26, 1934 Great Britain Oct. 3, 1938 

